Define virtual reality (VR).

Virtual reality (VR) is best defined as an immersive technology that creates a simulated environment. This involves using computer-generated imagery to provide users with a comprehensive sensory experience, typically achieved through VR headsets or gloves that track movements and allow users to interact with the digital environment.

The notable aspect of VR is its ability to fully immerse the user in a digitally created world, which can replicate real-world settings or create entirely fantastical environments. This immersive experience is differentiated from other technologies, as it often engages multiple senses, including sight and sound, which enhances user engagement and interaction.

In contrast to the other choices, which either misrepresent VR or limit its scope, the correct identification of VR emphasizes its broader applications beyond just gaming, encompassing training simulations, educational experiences, and virtual tours, among others. This makes it a powerful tool in various fields, not solely confined to gaming or basic functionalities like video conferencing.